Pneumatic tool.



No. 755,324. PATENTED MAR. 22, 1904.

` W. H. soLEY.

PNEUMATIC TOOL.

APPLICATION FILED SEPT. 18, 1903.

N0 MODEL.

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UNITED vSTATES Patented March 22', 1904i."-

PATENT OFFICE.

WILLIAM II. sOLEY, OE PHILADELPHIA, y y y ONE-HALE ro THOs. H. DALLETT oo., A CORPORATION yor NEW JERSEY.

PENNSYLVANIA, AssIGNOE OE PNEUMATIC' TOOL.

SPECIFICATION forming part of Letters Patent No. 755,324, vdated March 22, 1904.

Application filed September 18, 1903. Serial No. 173,653. (No model.)

To all whom it may concern:

ABe it known that I, WILLIAM H. SOLEY, a

-citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement In vPneumatic Tools, of which `the following is a full, clear, and exact description, reference being hadA to the accompanying drawings, which form a part of this specilication.

I will iirst describe'the embodiment of my invention illustrated in the accompanying drawings and then point out the invention in the claims.

Figure 1 is a section of my improved pneu'- matic tool on line l l, Fig. 6. Fig. 2 is asection of my improved pneumatic tool on line 2 2, Fig. 6. Fig. 3 is a view similar to Fig. l with valve and piston in opposite positions. Fig. 4 is a view similar to Fig. 2 with valve and piston in opposite positions. Fig. 5 is a section on line 5 5, Fig. 2. Fig. 6 is a section lon line 6 6, Fig. 2. Fig. 7 is asection on line 8 8, Fig. 2. Fig. 8 is a section on line 8 8, Fig. 2. Fig. 9 is a section on line 9 9, Fig. 6.

A is the casing, having the piston-chamber B and valve-chamber C. In the piston-chamber B is the piston D, and in the valve-chamber C is the valve E. This Vvalve is a differential valve, the top surface e being smaller The valve E also than the bottom surface e. has the passage e2 through it, said passage e2 being closed at the bottom with the exception of the small opening e3, which connects the passage 'e2 with the valve-chamber beneath the valve. From this portion of the valve-chamber a passage e* extends to the upper end of the piston-chamber. Through the valve at its lower end are oriiices e6. When the valve is in the position shown in Figs'. l and 2, the live air is admitted to the valve lfrom the source of pressure-supply through passage F into the passages G, leading to the bottom of the piston-chamber. When the valve is in the position shown in Figs. 3 and 4, the orifices e6 are in connection with passages e7, leading to the top of the piston-chamber.

y 'ff are `orifices in the piston-chamber connecting with a cut-away portion f', connected with anv exhaust-opening through the casing. H is the main exhaust. In the valve-casing are the annular passages la It h2, separated by flanges. f

' When the valve is in the position shown in Figs. l and 2, the annular passage h registers with the passages I, terminating in the upper `portion of the piston-chamber.

When the valve is in the position shown in Figs. 3 and 4, the annular passage /t registers vwith passage Gr from the bottom of the pistonchamber.

Such being the construction, the operation is as follows: Taking the parts in the position shown in Figs. land 2, thelive air will pass through the passage G to the bottom of the piston-chamber, moving the piston upward. The air in front of the piston willexhaust through the orifices f f and through the passage I. Any air passing through the small opening e3 and entering the pistonchamber through passage e4 will exhaust through the passage I and not affect the upward movement of the piston. When the piston has moved upward a distance sufficient to close the exhaust I and the passage e, the air passing through the opening e3 will be trapped and exert a pressure upon the surface e of the valve, which, being the portion of the val-ve of greater area, will cause the valve to shift to the position shown in Figs. 3 and 4.

When the parts are in the position shown in Figs. 3 and 4, the live air passes through the orifices e6 into passages e7 to the top of the piston-chamber and the piston tends to move downward. The air below the piston escapes through the passages G, annular passage t, and exhaust H.

Having now fully described. my invention,

what I claim, and desire to protect by Letters Patent, is-

1. In a pneumatic tool, in combination, a piston-chamber, a piston in said chamber, a valve-chamber, a valve in said chamber, said valve having pressure-surfaces of dierent areas, a constant connection between the source of supply and the valve-chamber contiguous to the pressure-surface of greater area and a passage from that portion of the valve-chamber to the piston-chamber.

2. In a pneumatic tool, in combination, a piston-chamber, a piston in said chamber, a valve-chamber, a valve in said chamber, said valve having pressure-surfaces of different areas, a constant connection between the source of supply and the valve-chamber contiguous to the pressure-surface of greater area and a passage from that portion of the valve-chamber to the piston-chamber, adapted to be closed by the piston in its movement.

3. In a pneumatic tool, in combination, a piston-chamber, a piston in said chamber, a valve-chamber, a valve in said chamber, said Valve having pressure-surfaces of different areas, an orifice through the pressure-surface of greater area, and a passage from the valvechamber contiguous to said orifice extending to the piston-chamber.

4. In a pneumatic tool, in combination, a piston-chamber, a piston in said chamber, a valve-chamber, a valve in said chamber, said valve having pressure-surfaces of different areas, an orilice through the pressure-surfaces of greater area, and a passage from the valvecharnber contiguous to said orifice extending to the piston-chamber, adapted to be closed by the piston in its movement.

5. In a pneumatic tool, in combination, a piston-chamber, a piston in said chamber, a valve-chamber, a valve in said chamber, said valve having pressure-surfaces of different -a1eas, an orifice through the pressure-surface of greater area, the interior of the valve being in constant communication with the airsupply, and a passage from the valve-chamber contiguous to said orifice extending to the piston-chamber.

6. In a pneumatic tool, in combination, a piston-chamber, a piston in said chamber, a Valve-chamber, a valve in` said chamber, said valve having pressure-surfaces of different areas, an orifice through the pressure-surface of greater area, the interior of the valve being in constant communication with the airsupply, and a passage from the Valve-charm ber contiguous to said orifice extending to the piston-chamber, adapted to be closed by the piston in its movement.

In testimony of which invention I have hereunto set my hand at Philadelphia on this 15th day of September, 1903.

WILLIAM H. SOLEY.

Witnesses:

M. F. ELLIS, M. M. HAMILTON. 

